From: Voker57 <voker57@xxxxxxxxx>
If total data amount to hash is zero, we cannot submit it to QCE,
since it locks up on zero-sized updates. So, return pre-computed
SHA256/SHA1 hash.
Signed-off-by: Iaroslav Gridin <voker57@xxxxxxxxx>
---
drivers/crypto/qce/sha.c | 27 ++++++++++++++++++++++++---
1 file changed, 24 insertions(+), 3 deletions(-)
diff --git a/drivers/crypto/qce/sha.c b/drivers/crypto/qce/sha.c
index f199f28..c627b5d 100644
--- a/drivers/crypto/qce/sha.c
+++ b/drivers/crypto/qce/sha.c
@@ -80,6 +80,7 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
struct qce_sha_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
struct qce_alg_template *tmpl = to_ahash_tmpl(async_req->tfm);
struct qce_device *qce = tmpl->qce;
+ unsigned int digestsize = crypto_ahash_digestsize(crypto_ahash_reqtfm(req));
unsigned long flags = rctx->flags;
int ret;
@@ -91,6 +92,29 @@ static int qce_ahash_async_req_handle(struct crypto_async_request *async_req)
rctx->authklen = AES_KEYSIZE_128;
}
+ if (!req->nbytes) {
+ /* Only way that can happen is if total size of digest is zero
+ * So since QCE gets stuck on zero-sized texts, we return
+ * pre-calculated hash
+ */
+ if (digestsize == SHA1_DIGEST_SIZE) {
+ memcpy(rctx->digest,
+ "\xda\x39\xa3\xee\x5e\x6b\x4b\x0d\x32\x55\xbf\xef\x95\x60\x18\x90\xaf\xd8\x07\x09",
+ SHA1_DIGEST_SIZE);
+ } else if (digestsize == SHA256_DIGEST_SIZE) {
+ memcpy(rctx->digest,
+ "\xe3\xb0\xc4\x42\x98\xfc\x1c\x14\x9a\xfb\xf4\xc8\x99\x6f\xb9\x24\x27\xae\x41\xe4\x64\x9b\x93\x4c\xa4\x95\x99\x1b\x78\x52\xb8\x55",
+ SHA256_DIGEST_SIZE);
+ } else {
+ qce->async_req_done(tmpl->qce, -EINVAL);
+ return -EINVAL;
+ }
+ if (req->result)
+ memcpy(req->result, rctx->digest, digestsize);
+ qce->async_req_done(tmpl->qce, 0);
+ return 0;
+ }
+
rctx->src_nents = sg_nents_for_len(req->src, req->nbytes);
if (rctx->src_nents < 0) {
dev_err(qce->dev, "Invalid numbers of src SG.\n");
@@ -322,9 +346,6 @@ static int qce_ahash_final(struct ahash_request *req)
struct qce_alg_template *tmpl = to_ahash_tmpl(req->base.tfm);
struct qce_device *qce = tmpl->qce;
- if (!rctx->buflen)
- return 0;
-
/* If hash is already been finalized, don't do anything */
if (rctx->finalized)
return 0;
--
2.9.3
--
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